updated gitignore

.gitignore

@@ -0,0 +1,3 @@
+slock
+*.o
+config.h

Makefile

@@ -36,7 +36,7 @@ dist: clean
 	@echo creating dist tarball
 	@mkdir -p slock-${VERSION}
 	@cp -R LICENSE Makefile README slock.1 config.mk \
-		${SRC} explicit_bzero.c config.def.h arg.h util.h slock-${VERSION}
+		${SRC} config.def.h arg.h util.h slock-${VERSION}
 	@tar -cf slock-${VERSION}.tar slock-${VERSION}
 	@gzip slock-${VERSION}.tar
 	@rm -rf slock-${VERSION}

README.md

@@ -1,6 +0,0 @@
-# slock
-This is my patched version of st. The base version is directly from suckless.org.
-
-## Patches
-The list below shows the currently applied patches to the master branch.
-- slock-dpms-1.4.diff (turns off the monitor after a given time)

config.def.h

@@ -11,5 +11,5 @@ static const char *colorname[NUMCOLS] = {
 /* treat a cleared input like a wrong password (color) */
 static const int failonclear = 1;
 
-/* time in seconds before the monitor shuts down */
+/* Background image path, should be available to the user above */
-static const int monitortime = 3;
+static const char* background_image = "";

config.h

@@ -1,15 +0,0 @@
-/* user and group to drop privileges to */
-static const char *user  = "nobody";
-static const char *group = "nobody";
-
-static const char *colorname[NUMCOLS] = {
-	[INIT] =   "black",     /* after initialization */
-	[INPUT] =  "#005577",   /* during input */
-	[FAILED] = "#CC3333",   /* wrong password */
-};
-
-/* treat a cleared input like a wrong password (color) */
-static const int failonclear = 1;
-
-/* time in seconds before the monitor shuts down */
-static const int monitortime = 3;

config.mk

@@ -1,5 +1,5 @@
 # slock version
-VERSION = 1.4
+VERSION = 1.5
 
 # Customize below to fit your system
 
@@ -12,7 +12,7 @@ X11LIB = /usr/X11R6/lib
 
 # includes and libs
 INCS = -I. -I/usr/include -I${X11INC}
-LIBS = -L/usr/lib -lc -lcrypt -L${X11LIB} -lX11 -lXext -lXrandr
+LIBS = -L/usr/lib -lc -lcrypt -L${X11LIB} -lX11 -lXext -lXrandr -lImlib2
 
 # flags
 CPPFLAGS = -DVERSION=\"${VERSION}\" -D_DEFAULT_SOURCE -DHAVE_SHADOW_H

slock-background-image-20220318-1c5a538.diff

@@ -0,0 +1,149 @@
+From 1c5a5383a1cf3351fe9c80a21cfbc98c5ec4355d Mon Sep 17 00:00:00 2001
+From: Yan Doroshenko <yan1994doroshenko@gmail.com>
+Date: Fri, 18 Mar 2022 12:28:13 +0100
+Subject: [PATCH] Provide a way to set a background image
+
+---
+ config.def.h |  5 ++++-
+ config.mk    |  2 +-
+ slock.c      | 50 +++++++++++++++++++++++++++++++++++++++++++++++---
+ 3 files changed, 52 insertions(+), 5 deletions(-)
+
+diff --git a/config.def.h b/config.def.h
+index 9855e21..eb88b3d 100644
+--- a/config.def.h
++++ b/config.def.h
+@@ -1,6 +1,6 @@
+ /* user and group to drop privileges to */
+ static const char *user  = "nobody";
+-static const char *group = "nogroup";
++static const char *group = "nobody";
+ 
+ static const char *colorname[NUMCOLS] = {
+ 	[INIT] =   "black",     /* after initialization */
+@@ -10,3 +10,6 @@ static const char *colorname[NUMCOLS] = {
+ 
+ /* treat a cleared input like a wrong password (color) */
+ static const int failonclear = 1;
++
++/* Background image path, should be available to the user above */
++static const char* background_image = "";
+diff --git a/config.mk b/config.mk
+index 74429ae..987819e 100644
+--- a/config.mk
++++ b/config.mk
+@@ -12,7 +12,7 @@ X11LIB = /usr/X11R6/lib
+ 
+ # includes and libs
+ INCS = -I. -I/usr/include -I${X11INC}
+-LIBS = -L/usr/lib -lc -lcrypt -L${X11LIB} -lX11 -lXext -lXrandr
++LIBS = -L/usr/lib -lc -lcrypt -L${X11LIB} -lX11 -lXext -lXrandr -lImlib2
+ 
+ # flags
+ CPPFLAGS = -DVERSION=\"${VERSION}\" -D_DEFAULT_SOURCE -DHAVE_SHADOW_H
+diff --git a/slock.c b/slock.c
+index 5ae738c..345a279 100644
+--- a/slock.c
++++ b/slock.c
+@@ -18,6 +18,7 @@
+ #include <X11/keysym.h>
+ #include <X11/Xlib.h>
+ #include <X11/Xutil.h>
++#include <Imlib2.h>
+ 
+ #include "arg.h"
+ #include "util.h"
+@@ -35,6 +36,7 @@ struct lock {
+ 	int screen;
+ 	Window root, win;
+ 	Pixmap pmap;
++	Pixmap bgmap;
+ 	unsigned long colors[NUMCOLS];
+ };
+ 
+@@ -46,6 +48,8 @@ struct xrandr {
+ 
+ #include "config.h"
+ 
++Imlib_Image image;
++
+ static void
+ die(const char *errstr, ...)
+ {
+@@ -190,9 +194,10 @@ readpw(Display *dpy, struct xrandr *rr, struct lock **locks, int nscreens,
+ 			color = len ? INPUT : ((failure || failonclear) ? FAILED : INIT);
+ 			if (running && oldc != color) {
+ 				for (screen = 0; screen < nscreens; screen++) {
+-					XSetWindowBackground(dpy,
+-					                     locks[screen]->win,
+-					                     locks[screen]->colors[color]);
++                                        if (locks[screen]->bgmap)
++                                                XSetWindowBackgroundPixmap(dpy, locks[screen]->win, locks[screen]->bgmap);
++                                        else
++                                                XSetWindowBackground(dpy, locks[screen]->win, locks[screen]->colors[0]);
+ 					XClearWindow(dpy, locks[screen]->win);
+ 				}
+ 				oldc = color;
+@@ -235,6 +240,17 @@ lockscreen(Display *dpy, struct xrandr *rr, int screen)
+ 	lock->screen = screen;
+ 	lock->root = RootWindow(dpy, lock->screen);
+ 
++        if(image)
++        {
++            lock->bgmap = XCreatePixmap(dpy, lock->root, DisplayWidth(dpy, lock->screen), DisplayHeight(dpy, lock->screen), DefaultDepth(dpy, lock->screen));
++            imlib_context_set_display(dpy);
++            imlib_context_set_visual(DefaultVisual(dpy, lock->screen));
++            imlib_context_set_colormap(DefaultColormap(dpy, lock->screen));
++            imlib_context_set_drawable(lock->bgmap);
++            imlib_render_image_on_drawable(0, 0);
++            imlib_free_image();
++        }
++
+ 	for (i = 0; i < NUMCOLS; i++) {
+ 		XAllocNamedColor(dpy, DefaultColormap(dpy, lock->screen),
+ 		                 colorname[i], &color, &dummy);
+@@ -251,6 +267,8 @@ lockscreen(Display *dpy, struct xrandr *rr, int screen)
+ 	                          CopyFromParent,
+ 	                          DefaultVisual(dpy, lock->screen),
+ 	                          CWOverrideRedirect | CWBackPixel, &wa);
++        if(lock->bgmap)
++          XSetWindowBackgroundPixmap(dpy, lock->win, lock->bgmap);
+ 	lock->pmap = XCreateBitmapFromData(dpy, lock->win, curs, 8, 8);
+ 	invisible = XCreatePixmapCursor(dpy, lock->pmap, lock->pmap,
+ 	                                &color, &color, 0, 0);
+@@ -355,6 +373,32 @@ main(int argc, char **argv) {
+ 	if (setuid(duid) < 0)
+ 		die("slock: setuid: %s\n", strerror(errno));
+ 
++	/* Load picture */
++        Imlib_Image buffer = imlib_load_image(background_image);
++	imlib_context_set_image(buffer);
++        int background_image_width = imlib_image_get_width();
++        int background_image_height = imlib_image_get_height();
++
++        /* Create an image to be rendered */
++	Screen *scr = ScreenOfDisplay(dpy, DefaultScreen(dpy));
++	image = imlib_create_image(scr->width, scr->height);
++        imlib_context_set_image(image);
++
++        /* Fill the image for every X monitor */
++        XRRMonitorInfo	*monitors;
++        int number_of_monitors;
++        monitors = XRRGetMonitors(dpy, RootWindow(dpy, XScreenNumberOfScreen(scr)), True, &number_of_monitors);
++
++        int i;
++        for (i = 0; i < number_of_monitors; i++) {
++            imlib_blend_image_onto_image(buffer, 0, 0, 0, background_image_width, background_image_height, monitors[i].x, monitors[i].y, monitors[i].width, monitors[i].height);
++        }
++
++        /* Clean up */
++        imlib_context_set_image(buffer);
++        imlib_free_image();
++        imlib_context_set_image(image);
++
+ 	/* check for Xrandr support */
+ 	rr.active = XRRQueryExtension(dpy, &rr.evbase, &rr.errbase);
+ 
+-- 
+2.35.1
+

slock-dpms-1.4.diff

@@ -1,62 +0,0 @@
-diff --git a/config.def.h b/config.def.h
-index 9855e21..d01bd38 100644
---- a/config.def.h
-+++ b/config.def.h
-@@ -10,3 +10,6 @@ static const char *colorname[NUMCOLS] = {
- 
- /* treat a cleared input like a wrong password (color) */
- static const int failonclear = 1;
-+
-+/* time in seconds before the monitor shuts down */
-+static const int monitortime = 5;
-diff --git a/slock.c b/slock.c
-index d2f0886..f65a43b 100644
---- a/slock.c
-+++ b/slock.c
-@@ -15,6 +15,7 @@
- #include <unistd.h>
- #include <sys/types.h>
- #include <X11/extensions/Xrandr.h>
-+#include <X11/extensions/dpms.h>
- #include <X11/keysym.h>
- #include <X11/Xlib.h>
- #include <X11/Xutil.h>
-@@ -306,6 +307,7 @@ main(int argc, char **argv) {
- 	const char *hash;
- 	Display *dpy;
- 	int s, nlocks, nscreens;
-+	CARD16 standby, suspend, off;
- 
- 	ARGBEGIN {
- 	case 'v':
-@@ -366,6 +368,20 @@ main(int argc, char **argv) {
- 	if (nlocks != nscreens)
- 		return 1;
- 
-+	/* DPMS magic to disable the monitor */
-+	if (!DPMSCapable(dpy))
-+		die("slock: DPMSCapable failed\n");
-+	if (!DPMSEnable(dpy))
-+		die("slock: DPMSEnable failed\n");
-+	if (!DPMSGetTimeouts(dpy, &standby, &suspend, &off))
-+		die("slock: DPMSGetTimeouts failed\n");
-+	if (!standby || !suspend || !off)
-+		die("slock: at least one DPMS variable is zero\n");
-+	if (!DPMSSetTimeouts(dpy, monitortime, monitortime, monitortime))
-+		die("slock: DPMSSetTimeouts failed\n");
-+
-+	XSync(dpy, 0);
-+
- 	/* run post-lock command */
- 	if (argc > 0) {
- 		switch (fork()) {
-@@ -383,5 +399,9 @@ main(int argc, char **argv) {
- 	/* everything is now blank. Wait for the correct password */
- 	readpw(dpy, &rr, locks, nscreens, hash);
- 
-+	/* reset DPMS values to inital ones */
-+	DPMSSetTimeouts(dpy, standby, suspend, off);
-+	XSync(dpy, 0);
-+
- 	return 0;
- }

slock.c

@@ -15,10 +15,10 @@
 #include <unistd.h>
 #include <sys/types.h>
 #include <X11/extensions/Xrandr.h>
-#include <X11/extensions/dpms.h>
 #include <X11/keysym.h>
 #include <X11/Xlib.h>
 #include <X11/Xutil.h>
+#include <Imlib2.h>
 
 #include "arg.h"
 #include "util.h"
@@ -36,6 +36,7 @@ struct lock {
 	int screen;
 	Window root, win;
 	Pixmap pmap;
+	Pixmap bgmap;
 	unsigned long colors[NUMCOLS];
 };
 
@@ -47,6 +48,8 @@ struct xrandr {
 
 #include "config.h"
 
+Imlib_Image image;
+
 static void
 die(const char *errstr, ...)
 {
@@ -191,9 +194,10 @@ readpw(Display *dpy, struct xrandr *rr, struct lock **locks, int nscreens,
 			color = len ? INPUT : ((failure || failonclear) ? FAILED : INIT);
 			if (running && oldc != color) {
 				for (screen = 0; screen < nscreens; screen++) {
-					XSetWindowBackground(dpy,
+                                        if (locks[screen]->bgmap)
-					                     locks[screen]->win,
+                                                XSetWindowBackgroundPixmap(dpy, locks[screen]->win, locks[screen]->bgmap);
-					                     locks[screen]->colors[color]);
+                                        else
+                                                XSetWindowBackground(dpy, locks[screen]->win, locks[screen]->colors[0]);
 					XClearWindow(dpy, locks[screen]->win);
 				}
 				oldc = color;
@@ -236,6 +240,17 @@ lockscreen(Display *dpy, struct xrandr *rr, int screen)
 	lock->screen = screen;
 	lock->root = RootWindow(dpy, lock->screen);
 
+        if(image)
+        {
+            lock->bgmap = XCreatePixmap(dpy, lock->root, DisplayWidth(dpy, lock->screen), DisplayHeight(dpy, lock->screen), DefaultDepth(dpy, lock->screen));
+            imlib_context_set_display(dpy);
+            imlib_context_set_visual(DefaultVisual(dpy, lock->screen));
+            imlib_context_set_colormap(DefaultColormap(dpy, lock->screen));
+            imlib_context_set_drawable(lock->bgmap);
+            imlib_render_image_on_drawable(0, 0);
+            imlib_free_image();
+        }
+
 	for (i = 0; i < NUMCOLS; i++) {
 		XAllocNamedColor(dpy, DefaultColormap(dpy, lock->screen),
 		                 colorname[i], &color, &dummy);
@@ -252,6 +267,8 @@ lockscreen(Display *dpy, struct xrandr *rr, int screen)
 	                          CopyFromParent,
 	                          DefaultVisual(dpy, lock->screen),
 	                          CWOverrideRedirect | CWBackPixel, &wa);
+        if(lock->bgmap)
+          XSetWindowBackgroundPixmap(dpy, lock->win, lock->bgmap);
 	lock->pmap = XCreateBitmapFromData(dpy, lock->win, curs, 8, 8);
 	invisible = XCreatePixmapCursor(dpy, lock->pmap, lock->pmap,
 	                                &color, &color, 0, 0);
@@ -315,7 +332,6 @@ main(int argc, char **argv) {
 	const char *hash;
 	Display *dpy;
 	int s, nlocks, nscreens;
-	CARD16 standby, suspend, off;
 
 	ARGBEGIN {
 	case 'v':
@@ -357,6 +373,32 @@ main(int argc, char **argv) {
 	if (setuid(duid) < 0)
 		die("slock: setuid: %s\n", strerror(errno));
 
+	/* Load picture */
+        Imlib_Image buffer = imlib_load_image(background_image);
+	imlib_context_set_image(buffer);
+        int background_image_width = imlib_image_get_width();
+        int background_image_height = imlib_image_get_height();
+
+        /* Create an image to be rendered */
+	Screen *scr = ScreenOfDisplay(dpy, DefaultScreen(dpy));
+	image = imlib_create_image(scr->width, scr->height);
+        imlib_context_set_image(image);
+
+        /* Fill the image for every X monitor */
+        XRRMonitorInfo	*monitors;
+        int number_of_monitors;
+        monitors = XRRGetMonitors(dpy, RootWindow(dpy, XScreenNumberOfScreen(scr)), True, &number_of_monitors);
+
+        int i;
+        for (i = 0; i < number_of_monitors; i++) {
+            imlib_blend_image_onto_image(buffer, 0, 0, 0, background_image_width, background_image_height, monitors[i].x, monitors[i].y, monitors[i].width, monitors[i].height);
+        }
+
+        /* Clean up */
+        imlib_context_set_image(buffer);
+        imlib_free_image();
+        imlib_context_set_image(image);
+
 	/* check for Xrandr support */
 	rr.active = XRRQueryExtension(dpy, &rr.evbase, &rr.errbase);
 
@@ -376,20 +418,6 @@ main(int argc, char **argv) {
 	if (nlocks != nscreens)
 		return 1;
 
-	/* DPMS magic to disable the monitor */
-	if (!DPMSCapable(dpy))
-		die("slock: DPMSCapable failed\n");
-	if (!DPMSEnable(dpy))
-		die("slock: DPMSEnable failed\n");
-	if (!DPMSGetTimeouts(dpy, &standby, &suspend, &off))
-		die("slock: DPMSGetTimeouts failed\n");
-	if (!standby || !suspend || !off)
-		die("slock: at least one DPMS variable is zero\n");
-	if (!DPMSSetTimeouts(dpy, monitortime, monitortime, monitortime))
-		die("slock: DPMSSetTimeouts failed\n");
-
-	XSync(dpy, 0);
-
 	/* run post-lock command */
 	if (argc > 0) {
 		switch (fork()) {
@@ -407,9 +435,5 @@ main(int argc, char **argv) {
 	/* everything is now blank. Wait for the correct password */
 	readpw(dpy, &rr, locks, nscreens, hash);
 
-	/* reset DPMS values to inital ones */
-	DPMSSetTimeouts(dpy, standby, suspend, off);
-	XSync(dpy, 0);
-
 	return 0;
 }

slock.c.orig

@@ -1,395 +0,0 @@
-/* See LICENSE file for license details. */
-#define _XOPEN_SOURCE 500
-#if HAVE_SHADOW_H
-#include <shadow.h>
-#endif
-
-#include <ctype.h>
-#include <errno.h>
-#include <grp.h>
-#include <pwd.h>
-#include <stdarg.h>
-#include <stdlib.h>
-#include <stdio.h>
-#include <string.h>
-#include <unistd.h>
-#include <sys/types.h>
-#include <X11/extensions/Xrandr.h>
-#include <X11/keysym.h>
-#include <X11/Xlib.h>
-#include <X11/Xutil.h>
-
-#include "arg.h"
-#include "util.h"
-
-char *argv0;
-
-enum {
-	INIT,
-	INPUT,
-	FAILED,
-	NUMCOLS
-};
-
-struct lock {
-	int screen;
-	Window root, win;
-	Pixmap pmap;
-	unsigned long colors[NUMCOLS];
-};
-
-struct xrandr {
-	int active;
-	int evbase;
-	int errbase;
-};
-
-#include "config.h"
-
-static void
-die(const char *errstr, ...)
-{
-	va_list ap;
-
-	va_start(ap, errstr);
-	vfprintf(stderr, errstr, ap);
-	va_end(ap);
-	exit(1);
-}
-
-#ifdef __linux__
-#include <fcntl.h>
-#include <linux/oom.h>
-
-static void
-dontkillme(void)
-{
-	FILE *f;
-	const char oomfile[] = "/proc/self/oom_score_adj";
-
-	if (!(f = fopen(oomfile, "w"))) {
-		if (errno == ENOENT)
-			return;
-		die("slock: fopen %s: %s\n", oomfile, strerror(errno));
-	}
-	fprintf(f, "%d", OOM_SCORE_ADJ_MIN);
-	if (fclose(f)) {
-		if (errno == EACCES)
-			die("slock: unable to disable OOM killer. "
-			    "Make sure to suid or sgid slock.\n");
-		else
-			die("slock: fclose %s: %s\n", oomfile, strerror(errno));
-	}
-}
-#endif
-
-static const char *
-gethash(void)
-{
-	const char *hash;
-	struct passwd *pw;
-
-	/* Check if the current user has a password entry */
-	errno = 0;
-	if (!(pw = getpwuid(getuid()))) {
-		if (errno)
-			die("slock: getpwuid: %s\n", strerror(errno));
-		else
-			die("slock: cannot retrieve password entry\n");
-	}
-	hash = pw->pw_passwd;
-
-#if HAVE_SHADOW_H
-	if (!strcmp(hash, "x")) {
-		struct spwd *sp;
-		if (!(sp = getspnam(pw->pw_name)))
-			die("slock: getspnam: cannot retrieve shadow entry. "
-			    "Make sure to suid or sgid slock.\n");
-		hash = sp->sp_pwdp;
-	}
-#else
-	if (!strcmp(hash, "*")) {
-#ifdef __OpenBSD__
-		if (!(pw = getpwuid_shadow(getuid())))
-			die("slock: getpwnam_shadow: cannot retrieve shadow entry. "
-			    "Make sure to suid or sgid slock.\n");
-		hash = pw->pw_passwd;
-#else
-		die("slock: getpwuid: cannot retrieve shadow entry. "
-		    "Make sure to suid or sgid slock.\n");
-#endif /* __OpenBSD__ */
-	}
-#endif /* HAVE_SHADOW_H */
-
-	return hash;
-}
-
-static void
-readpw(Display *dpy, struct xrandr *rr, struct lock **locks, int nscreens,
-       const char *hash)
-{
-	XRRScreenChangeNotifyEvent *rre;
-	char buf[32], passwd[256], *inputhash;
-	int num, screen, running, failure, oldc;
-	unsigned int len, color;
-	KeySym ksym;
-	XEvent ev;
-
-	len = 0;
-	running = 1;
-	failure = 0;
-	oldc = INIT;
-
-	while (running && !XNextEvent(dpy, &ev)) {
-		if (ev.type == KeyPress) {
-			explicit_bzero(&buf, sizeof(buf));
-			num = XLookupString(&ev.xkey, buf, sizeof(buf), &ksym, 0);
-			if (IsKeypadKey(ksym)) {
-				if (ksym == XK_KP_Enter)
-					ksym = XK_Return;
-				else if (ksym >= XK_KP_0 && ksym <= XK_KP_9)
-					ksym = (ksym - XK_KP_0) + XK_0;
-			}
-			if (IsFunctionKey(ksym) ||
-			    IsKeypadKey(ksym) ||
-			    IsMiscFunctionKey(ksym) ||
-			    IsPFKey(ksym) ||
-			    IsPrivateKeypadKey(ksym))
-				continue;
-			switch (ksym) {
-			case XK_Return:
-				passwd[len] = '\0';
-				errno = 0;
-				if (!(inputhash = crypt(passwd, hash)))
-					fprintf(stderr, "slock: crypt: %s\n", strerror(errno));
-				else
-					running = !!strcmp(inputhash, hash);
-				if (running) {
-					XBell(dpy, 100);
-					failure = 1;
-				}
-				explicit_bzero(&passwd, sizeof(passwd));
-				len = 0;
-				break;
-			case XK_Escape:
-				explicit_bzero(&passwd, sizeof(passwd));
-				len = 0;
-				break;
-			case XK_BackSpace:
-				if (len)
-					passwd[--len] = '\0';
-				break;
-			default:
-				if (num && !iscntrl((int)buf[0]) &&
-				    (len + num < sizeof(passwd))) {
-					memcpy(passwd + len, buf, num);
-					len += num;
-				}
-				break;
-			}
-			color = len ? INPUT : ((failure || failonclear) ? FAILED : INIT);
-			if (running && oldc != color) {
-				for (screen = 0; screen < nscreens; screen++) {
-					XSetWindowBackground(dpy,
-					                     locks[screen]->win,
-					                     locks[screen]->colors[color]);
-					XClearWindow(dpy, locks[screen]->win);
-				}
-				oldc = color;
-			}
-		} else if (rr->active && ev.type == rr->evbase + RRScreenChangeNotify) {
-			rre = (XRRScreenChangeNotifyEvent*)&ev;
-			for (screen = 0; screen < nscreens; screen++) {
-				if (locks[screen]->win == rre->window) {
-					if (rre->rotation == RR_Rotate_90 ||
-					    rre->rotation == RR_Rotate_270)
-						XResizeWindow(dpy, locks[screen]->win,
-						              rre->height, rre->width);
-					else
-						XResizeWindow(dpy, locks[screen]->win,
-						              rre->width, rre->height);
-					XClearWindow(dpy, locks[screen]->win);
-					break;
-				}
-			}
-		} else {
-			for (screen = 0; screen < nscreens; screen++)
-				XRaiseWindow(dpy, locks[screen]->win);
-		}
-	}
-}
-
-static struct lock *
-lockscreen(Display *dpy, struct xrandr *rr, int screen)
-{
-	char curs[] = {0, 0, 0, 0, 0, 0, 0, 0};
-	int i, ptgrab, kbgrab;
-	struct lock *lock;
-	XColor color, dummy;
-	XSetWindowAttributes wa;
-	Cursor invisible;
-
-	if (dpy == NULL || screen < 0 || !(lock = malloc(sizeof(struct lock))))
-		return NULL;
-
-	lock->screen = screen;
-	lock->root = RootWindow(dpy, lock->screen);
-
-	for (i = 0; i < NUMCOLS; i++) {
-		XAllocNamedColor(dpy, DefaultColormap(dpy, lock->screen),
-		                 colorname[i], &color, &dummy);
-		lock->colors[i] = color.pixel;
-	}
-
-	/* init */
-	wa.override_redirect = 1;
-	wa.background_pixel = lock->colors[INIT];
-	lock->win = XCreateWindow(dpy, lock->root, 0, 0,
-	                          DisplayWidth(dpy, lock->screen),
-	                          DisplayHeight(dpy, lock->screen),
-	                          0, DefaultDepth(dpy, lock->screen),
-	                          CopyFromParent,
-	                          DefaultVisual(dpy, lock->screen),
-	                          CWOverrideRedirect | CWBackPixel, &wa);
-	lock->pmap = XCreateBitmapFromData(dpy, lock->win, curs, 8, 8);
-	invisible = XCreatePixmapCursor(dpy, lock->pmap, lock->pmap,
-	                                &color, &color, 0, 0);
-	XDefineCursor(dpy, lock->win, invisible);
-
-	/* Try to grab mouse pointer *and* keyboard for 600ms, else fail the lock */
-	for (i = 0, ptgrab = kbgrab = -1; i < 6; i++) {
-		if (ptgrab != GrabSuccess) {
-			ptgrab = XGrabPointer(dpy, lock->root, False,
-			                      ButtonPressMask | ButtonReleaseMask |
-			                      PointerMotionMask, GrabModeAsync,
-			                      GrabModeAsync, None, invisible, CurrentTime);
-		}
-		if (kbgrab != GrabSuccess) {
-			kbgrab = XGrabKeyboard(dpy, lock->root, True,
-			                       GrabModeAsync, GrabModeAsync, CurrentTime);
-		}
-
-		/* input is grabbed: we can lock the screen */
-		if (ptgrab == GrabSuccess && kbgrab == GrabSuccess) {
-			XMapRaised(dpy, lock->win);
-			if (rr->active)
-				XRRSelectInput(dpy, lock->win, RRScreenChangeNotifyMask);
-
-			XSelectInput(dpy, lock->root, SubstructureNotifyMask);
-			return lock;
-		}
-
-		/* retry on AlreadyGrabbed but fail on other errors */
-		if ((ptgrab != AlreadyGrabbed && ptgrab != GrabSuccess) ||
-		    (kbgrab != AlreadyGrabbed && kbgrab != GrabSuccess))
-			break;
-
-		usleep(100000);
-	}
-
-	/* we couldn't grab all input: fail out */
-	if (ptgrab != GrabSuccess)
-		fprintf(stderr, "slock: unable to grab mouse pointer for screen %d\n",
-		        screen);
-	if (kbgrab != GrabSuccess)
-		fprintf(stderr, "slock: unable to grab keyboard for screen %d\n",
-		        screen);
-	return NULL;
-}
-
-static void
-usage(void)
-{
-	die("usage: slock [-v] [cmd [arg ...]]\n");
-}
-
-int
-main(int argc, char **argv) {
-	struct xrandr rr;
-	struct lock **locks;
-	struct passwd *pwd;
-	struct group *grp;
-	uid_t duid;
-	gid_t dgid;
-	const char *hash;
-	Display *dpy;
-	int s, nlocks, nscreens;
-
-	ARGBEGIN {
-	case 'v':
-		fprintf(stderr, "slock-"VERSION"\n");
-		return 0;
-	default:
-		usage();
-	} ARGEND
-
-	/* validate drop-user and -group */
-	errno = 0;
-	if (!(pwd = getpwnam(user)))
-		die("slock: getpwnam %s: %s\n", user,
-		    errno ? strerror(errno) : "user entry not found");
-	duid = pwd->pw_uid;
-	errno = 0;
-	if (!(grp = getgrnam(group)))
-		die("slock: getgrnam %s: %s\n", group,
-		    errno ? strerror(errno) : "group entry not found");
-	dgid = grp->gr_gid;
-
-#ifdef __linux__
-	dontkillme();
-#endif
-
-	hash = gethash();
-	errno = 0;
-	if (!crypt("", hash))
-		die("slock: crypt: %s\n", strerror(errno));
-
-	if (!(dpy = XOpenDisplay(NULL)))
-		die("slock: cannot open display\n");
-
-	/* drop privileges */
-	if (setgroups(0, NULL) < 0)
-		die("slock: setgroups: %s\n", strerror(errno));
-	if (setgid(dgid) < 0)
-		die("slock: setgid: %s\n", strerror(errno));
-	if (setuid(duid) < 0)
-		die("slock: setuid: %s\n", strerror(errno));
-
-	/* check for Xrandr support */
-	rr.active = XRRQueryExtension(dpy, &rr.evbase, &rr.errbase);
-
-	/* get number of screens in display "dpy" and blank them */
-	nscreens = ScreenCount(dpy);
-	if (!(locks = calloc(nscreens, sizeof(struct lock *))))
-		die("slock: out of memory\n");
-	for (nlocks = 0, s = 0; s < nscreens; s++) {
-		if ((locks[s] = lockscreen(dpy, &rr, s)) != NULL)
-			nlocks++;
-		else
-			break;
-	}
-	XSync(dpy, 0);
-
-	/* did we manage to lock everything? */
-	if (nlocks != nscreens)
-		return 1;
-
-	/* run post-lock command */
-	if (argc > 0) {
-		switch (fork()) {
-		case -1:
-			die("slock: fork failed: %s\n", strerror(errno));
-		case 0:
-			if (close(ConnectionNumber(dpy)) < 0)
-				die("slock: close: %s\n", strerror(errno));
-			execvp(argv[0], argv);
-			fprintf(stderr, "slock: execvp %s: %s\n", argv[0], strerror(errno));
-			_exit(1);
-		}
-	}
-
-	/* everything is now blank. Wait for the correct password */
-	readpw(dpy, &rr, locks, nscreens, hash);
-
-	return 0;
-}